<template>
	<div>
		<!-- 面包屑导航区 -->
		<el-breadcrumb separator-class="el-icon-arrow-right">
		  <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
		  <el-breadcrumb-item>商品管理</el-breadcrumb-item>
		  <el-breadcrumb-item>参数列表</el-breadcrumb-item>
		</el-breadcrumb>
		<!-- 卡片视图区 -->
		<el-card>
			<el-alert
			    title="注意: 只允许为第三级分类设置相关参数!"
			    type="warning" :closable="false" show-icon>
			  </el-alert>
			
			<!-- 选择商品分类区 -->
			<el-row class="cat_opt">
				<el-col>
					<span>选择商品分类</span>
					<!-- 选择商品分类选择框 -->
					 <el-cascader
						expand-trigger="hover"
					    v-model="selectedCateKeys"
					    :options="catalist"
					    :props="cataProps"
					    @change="handleChange"></el-cascader>
				</el-col>
			</el-row>
			<!-- tabs分签区 -->
			 <el-tabs v-model="activeName" @tab-click="handleTabClick">
				 <!-- 添加动态参数面板 -->
			    <el-tab-pane label="用户管理" name="many">
					<el-button :disabled="isBtnDisabled" type="primary" size="mini" @click="addDialogVisible=true">添加参数</el-button>
					<!-- 动态参数表格 -->
						<el-table :data="manyTableData" border stripe>
							<!--展开行 -->
							<el-table-column type="expand">
								<template slot-scope="scope">
									<!-- 循环渲染tag标签 -->
									<el-tag v-for="(item,i) in scope.row.attr_vals" :key="i" closable @close="handleChose(i,scope.row)">
										{{item}}
									</el-tag>
									<!-- 输入文本框 -->
									<el-input
									  class="input-new-tag"
									  v-if="scope.row.inputVisible"
									  v-model="scope.row.inputValue"
									  ref="saveTagInput"
									  size="small"
									  @keyup.enter.native="handleInputConfirm(scope.row)"
									  @blur="handleInputConfirm(scope.row)"
									>
									</el-input>
									<!-- 添加的按钮 -->
									<el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
								</template>
							</el-table-column>
							<!-- 索引列 -->
							<el-table-column type="index"></el-table-column>
							<el-table-column label="参数名称" prop="attr_name"></el-table-column>
							<el-table-column label="操作" >
								<template slot-scope="scope">
									<el-button size="mini" type="primary" icon="el-icon-edit" @click="showEditDialog(scope.row.attr_id)">修改</el-button>
									<el-button size="mini" type="danger" icon="el-icon-delete" @click="removeParams(scope.row.attr_id)">删除</el-button>
								</template>
							</el-table-column>
						</el-table>
				</el-tab-pane>
				<!-- 添加静态属性面板 -->
			    <el-tab-pane label="配置管理" name="only">
					<el-button :disabled="isBtnDisabled" type="primary" size="mini"  @click="addDialogVisible=true">添加参数</el-button>
					<!-- 静态参数表格 -->
						<el-table :data="onlyTableData" border stripe>
							<!--展开行 -->
							<el-table-column type="expand">
								<template slot-scope="scope">
									<!-- 循环渲染tag标签 -->
									<el-tag v-for="(item,i) in scope.row.attr_vals" :key="i" closable @close="handleChose(i,scope.row)">
										{{item}}
									</el-tag>
									<!-- 输入文本框 -->
									<el-input
									  class="input-new-tag"
									  v-if="scope.row.inputVisible"
									  v-model="scope.row.inputValue"
									  ref="saveTagInput"
									  size="small"
									  @keyup.enter.native="handleInputConfirm(scope.row)"
									  @blur="handleInputConfirm(scope.row)"
									>
									</el-input>
									<!-- 添加的按钮 -->
									<el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
								</template>
							</el-table-column>
							<!-- 索引列 -->
							<el-table-column type="index"></el-table-column>
							<el-table-column label="属性名称" prop="attr_name"></el-table-column>
							<el-table-column label="操作" >
								<template slot-scope="scope">
									<el-button size="mini" type="primary" icon="el-icon-edit" @click="showEditDialog(scope.row.attr_id)">修改</el-button>
									<el-button size="mini" type="danger" icon="el-icon-delete" @click="removeParams(scope.row.attr_id)">删除</el-button>
								</template>
							</el-table-column>
						</el-table>
				</el-tab-pane>

			  </el-tabs>
		</el-card>
		
		<!-- 带参数的对话框 -->
		<el-dialog
		  :title="'添加' +titleText"
		  :visible.sync="addDialogVisible"
		  width="50%" @close="addDialogClosed">
		  <!-- 添加参数对话框 -->
		  <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px"  >
		    <el-form-item :label="titleText" prop="attr_name">
		      <el-input v-model="addForm.attr_name"></el-input>
		    </el-form-item>
		  </el-form>
		  <span slot="footer" class="dialog-footer">
		    <el-button @click="addDialogVisible = false">取 消</el-button>
		    <el-button type="primary" @click="addParams">确 定</el-button>
		  </span>
		</el-dialog>
		
		<!-- 修改对话框 -->
		<el-dialog
		  :title="'修改' +titleText"
		  :visible.sync="editDialogVisible"
		  width="50%" @close="editDialogClosed">
		  <!-- 添加参数对话框 -->
		  <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="100px"  >
		    <el-form-item :label="titleText" prop="attr_name">
		      <el-input v-model="editForm.attr_name"></el-input>
		    </el-form-item>
		  </el-form>
		  <span slot="footer" class="dialog-footer">
		    <el-button @click="editDialogVisible = false">取 消</el-button>
		    <el-button type="primary" @click="editParams">确 定</el-button>
		  </span>
		</el-dialog>
	</div>
</template>

<script>
	export default{
		data(){
			return{
				// 商品分类数据
				catalist:[],
				// 级联选择框对象
				cataProps:{
					value:'cat_id',
					label:'cat_name',
					children:'children'
					
				},
				// 级联选择框双向绑定数组
				selectedCateKeys:[],
				// 被激活的页签的名称
				activeName:'many',
				// 动态参数数据
				manyTableData:[],
				// 静态参数数据
				onlyTableData:[],
				//对话框的隐藏显示
				addDialogVisible:false,
				editDialogVisible:false,
				// 添加参数的表达数据对象
				addForm:{},
				// 添加表单的验证规则
				addFormRules:{
					attr_name:[{required:true, message:'请输入参数名称',trigger:'blur'},
					]
				},
				// 修改的表单数据对象
				editForm:{},
				// 添加表单的验证规则
				editFormRules:{
					attr_name:[{required:true, message:'请输入参数名称',trigger:'blur'},
					]
				},

				
			}
		},
		created(){
			this.getCateList()
		},
		methods:{
			async getCateList(){
				const{ data:res} =await this.$http.get('http://127.0.0.1:8888/api/private/v1/categories')
				if(res.meta.status!==200){
					return this.$message.error('获取商品分类失败')	
				}
					this.catalist=res.data
					console.log(this.catalist)
			},
			// 级联选择框点击事件
			handleChange(){
				this.getParamsData()
			},
			// tab 页签点击事件
			handleTabClick(){
				console.log(this.activeName)
				this.getParamsData()
			},
			// 获取参数的列表数据
			async getParamsData(){
				if(this.selectedCateKeys.length!==3){
					this.selectedCateKeys=[]
					this.manyTableData=[]
					this.onlyTableData=[]
					return 
				}
				// 根据所选id 获取对应参加
				const{ data:res} =await this.$http.get(`http://127.0.0.1:8888/api/private/v1/categories/${this.cateId}/attributes`,{params:{sel:this.activeName}})
				if(res.meta.status!==200){
					return this.$message.error('获取参数列表失败')	
				}
				res.data.forEach(item=>{
					
					item.attr_vals=item.attr_vals ? item.attr_vals.split(' ') :[],
					// 添加一个布尔值控制一个文本框的显示与隐藏
					item.inputVisible=false
					item.inputValue=''
				})
				
				
				
				if(this.activeName==='many'){
					this.manyTableData =res.data
				}else{
					this.onlyTableData=res.data
				}
			},
			// 监听添加对话框的关闭事件
			addDialogClosed(){
				this.$refs.addFormRef.resetFields()
			},
			// 点击按钮添加参数
			addParams(){
				this.$refs.addFormRef.validate(async valid=>
				{
					if(!valid) return
					const{ data:res} =await this.$http.post(`http://127.0.0.1:8888/api/private/v1/categories/${this.cateId}/attributes`,
						{attr_name:this.addForm.attr_name,
						attr_sel:this.activeName
					})
					if(res.meta.status!==201){
						return this.$message.error('添加参数失败')	
					}
					this.$message.success('添加参数成功')
					this.addDialogVisible=false
					this.getParamsData()
				})
			},
			// 点击按钮展示修改对话框
			async showEditDialog(attr_id){
				// 根据id查询当前数据
				const{ data:res} =await this.$http.get(`http://127.0.0.1:8888/api/private/v1/categories/${this.cateId}/attributes/${attr_id}`,
				{params:{attr_sel:this.activeName}})
				if(res.meta.status!==200){
					return this.$message.error('获取参数信息失败')	
				}
				this.editForm=res.data
				this.editDialogVisible=true
			},
			// 监听
			editDialogClosed(){
				this.$refs.editFormRef.resetFields()
			},
			// 点击按钮确定修改参数
			 editParams(){
				this.$refs.editFormRef.validate(async valid=>{
					if(!valid) return
					const{ data:res} =await this.$http.put(`http://127.0.0.1:8888/api/private/v1/categories/${this.cateId}/attributes/${this.editForm.attr_id}`,
					{
						attr_name: this.editForm.attr_name,
						attr_sel: this.activeName
					})
					if(res.meta.status!==200){
						return this.$message.error('修改参数失败')	
					}
					this.$message.success('添加参数成功')
					this.getParamsData()
					this.editDialogVisible=false
				})
			},
			
			// 点击按钮删除参数
			async removeParams(attr_id){
				const confirmResult=await this.$confirm('此操作将永久删除该参数, 是否继续?', '提示', {
				          confirmButtonText: '确定',
				          cancelButtonText: '取消',
				          type: 'warning'
				        }).catch(err=>err)
						// 用户取消删除的操作
						if(confirmResult!=='confirm'){
							return this.$message.info('已取消删除')
						}
						
						// 删除的业务逻辑
						const{ data:res} =await this.$http.delete(`http://127.0.0.1:8888/api/private/v1/categories/${this.cateId}/attributes/${attr_id}`)
						if(res.meta.status!==200){
							return this.$message.error('删除参数失败')	
						}
						this.$message.success('删除参数成功')
						this.getParamsData()
			},
			// 文本框失去焦点 Enter
			async handleInputConfirm(row){
				if(row.inputValue.trim().length===0){
					row.inputValue=''
					row.inputVisible=false
					return 
				}
				// 用户输入真实的内容
				row.attr_vals.push(row.inputValue.trim())
				row.inputValue=''
				row.inputVisible=false
				// 需求发起请求。保存接口
				this.saveAttrVals(row)
				
			},
			// 将对attr_vals的操作保存到数据库
			async saveAttrVals(row){
				// 需求发起请求。保存接口
				const{ data:res} =await this.$http.put(`http://127.0.0.1:8888/api/private/v1/categories/${this.cateId}/attributes/${row.attr_id}`,
				{
					attr_name:row.attr_name,
					attr_sel:row.attr_sel,
					attr_vals:row.attr_vals.join(' ')
				}
				)
				if(res.meta.status!==200){
					return this.$message.error('修改参数项失败')	
				}
				this.$message.success('添加参数项成功')
			},
			//点击按钮 
			showInput(row){
				row.inputVisible=true
				// &nextTick 方法的作用就是当前页码上元素被重新渲染之后，才会指定回调函数中的代码
				 this.$nextTick(_ => {
				          this.$refs.saveTagInput.$refs.input.focus();
				});
			},
			//删除对应的参数说选项
			handleChose(i,row){
				row.attr_vals.splice(i,1)
				this.saveAttrVals(row)
			}
			
			
				
		},
		computed:{
			// 如果按钮需要被禁用，则返回true 否则返回false
			isBtnDisabled(){
				if(this.selectedCateKeys.length!==3){
					return true
				}
				return false
			},
			// 当前选择的三级分类id
			cateId(){
				if(this.selectedCateKeys.length==3){
					return this.selectedCateKeys[2]
				}
				return null
			},
			// 动态计算标题文本
			titleText(){
				if(this.activeName==='many'){
					return '动态参数'
				}
				return '静态参数'
			}
			
		}
	}
</script>

<style lang="less" scoped>
	.cat_opt{
		margin:15px 0 ;
	}
	.el-tag{
		margin: 10px;
	}
	.input-new-tag{
		width: 120px;
	}
</style>
